Help with ASp.NET Page Post Back

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C#

ASP.NET

I have 7 AJAX accordions on an asp.net page. When the data in the first accordion is submitted into the database, the user proceeds to the second accordion and fill out the form then submit, the same thing applies to the rest of the accordion. But i get to realize that if lets say accordion three validation fails when i refresh the post [of course a post back is fired] the data in the first accordion get submitted even after i have cleared the form. how can i go about this

Thanks